The word imperturbable is define as something or someone that is very calm, very incapable of being upset or agitated or disturb. So based on the definition of the word and how the word is use in the sentence we could say it means "CALM".
B.
Since the quotations and italics are in the right place, B is the correct answer.
Answer:
D. Sustenance
Explanation:
Livelihood is the course of ones life. Sustenance is the support you gain by food and drinks.
The paragraph suggests that the shepherd wants to put down the dog and end its course of life.
A. Shelter ❌
B. Enjoyment ❌
C. A treat ❌